First thing Scorrie I drive at a steady 60mph I believe that is the speed limit unless I'm stuck behind someone going slowly if I can I overtake if safe to do so .As for taking a bus the times I travel to work there are no buses so I have to drive I don't have any option.
Rather than "believe" what the speed limit is, you should "know" what the limit is. You should also "know" that it is the maximum permitted on some roads and that it is lower on others.
Having said that, you should always drive according to the prevailing conditions and not just rumble along at 60 mph because "that is the limit".
I'm beginning to think that you just might be part of the problem and, not the solution....